body {
    background-color: #0c0c0e;
    color: #e2e8f0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.7;
    margin: 0;
    padding: 0;
}
.header-nav {
    background: #121216;
    padding: 15px 40px;
    border-bottom: 1px solid #1e1e24;
}
.header-nav a {
    color: #94a3b8;
    text-decoration: none;
    font-weight: 500;
    margin-right: 20px;
}
.header-nav a:hover, .header-nav a.active {
    color: #38bdf8;
}
.content {
    max-width: 780px;
    margin: 0 auto;
    padding: 60px 20px;
}
h1 { color: #ffffff; font-size: 2.2rem; margin-bottom: 5px; }
.subtitle { color: #64748b; font-family: monospace; font-size: 0.95rem; margin-bottom: 30px; display: block; }
h2 { color: #ffffff; font-size: 1.5rem; margin-top: 40px; padding-bottom: 6px; border-bottom: 1px solid #1e1e24; }
h3 { color: #38bdf8; font-size: 1.15rem; margin-top: 25px; }
p { font-size: 1.1rem; color: #cbd5e1; margin-bottom: 20px; }
.step-nav {
    display: flex;
    justify-content: space-between;
    margin: 50px 0 20px 0;
    padding-top: 20px;
    border-top: 1px solid #1e1e24;
}
.step-nav a {
    color: #38bdf8;
    text-decoration: none;
    font-weight: 600;
}
.step-nav a:hover { text-decoration: underline; }
.code-header {
    background: #1e1e24;
    color: #94a3b8;
    font-family: monospace;
    font-size: 0.85rem;
    padding: 6px 16px;
    border-radius: 4px 4px 0 0;
    border: 1px solid #27272a;
    border-bottom: none;
    margin-top: 24px;
}
pre {
    background: #121214;
    border: 1px solid #27272a;
    padding: 16px;
    border-radius: 0 0 4px 4px;
    font-family: monospace;
    font-size: 0.95rem;
    color: #38bdf8;
    overflow-x: auto;
    margin: 0 0 24px 0;
}
.highlight { color: #ffffff; font-weight: 600; }